[Snyk] Fix for 6 vulnerabilities

[kszarek]

Snyk has created this PR to fix 6 vulnerabilities in the rubygems dependencies of this project.

Snyk changed the following file(s):

• Gemfile

⚠️ Warning

Failed to update the Gemfile.lock, please update manually before merging.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Session Fixation SNYK-RUBY-RESTCLIENT-20211	704
	Information Exposure SNYK-RUBY-CHEF-20450	589
	Arbitrary File Write via Archive Extraction (Zip Slip) SNYK-RUBY-MINITAR-20335	589
	Arbitrary Code Injection SNYK-RUBY-FARADAYMIDDLEWARE-20334	579
	Code Injection SNYK-RUBY-RDOC-6476871	439
	Local Plaintext Password Disclosure SNYK-RUBY-RESTCLIENT-20204	414

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• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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